Improvement in air-brakes



T. LUCE.

Improvement in Air-Brakes.

No. 131,286. Patente d Sep.10, 1872.

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Tnnononn LUGE, or RIOHMONDVILLE,ilHGHIGAN.

IMFRCVEMENT IN AIR-BRAKES.

Specification forming part of Letters Patent No. llfilfifi, datedSeptember 10, 1872.

To whom it may concern.- Be it known that I, Tnnononn Leon, 0Richmondville, in the county of Sanilac and State of Michigan, haveinvented a new and useful Improvement in Atmospheric Air- Brakes; and Ido declare that the following is a true and accurate descriptionthereof, reference being had to the accompanying. drawing and to theletters of reference marked thereon and being a part of thisspecification,

in which Figure l is a perspective View of my improvement, and Fig. 2 avertical section of the same.

Like letters indicate like parts in each figure.

The nature of this invention relates to the construction of a brakewherein the pressure of the atmosphere is alone employed to operate thebrakes, in contradistinction of devices of a similar nomenclature wherethe compression of the air is relied upon to produce a like result.

In the acccmpanyin g drawing, A represents a suitable-sized cylinderwith open ends, which may be. covered with gauze or any other suitablematerial which will exclude dust, while not of sufficient density toprevent the free passage of air. This cylinder should be placedunderneath the railway-ear and near the center, and is provided with twopistons, B, the rods G of which, at their outer ends, are designed toconnect with the brakes. A pipe, D, connecting with the interior of saidcylinder,

opens into another pipe, E, which, in time, connects with the air-pump Fby means of suitable branch-pipes G H, the former leading into thebottom of said pump, while the latter leads into the top of the same.

The pump may be stationed at any convenient point on the train, and asmany cylinders A may be used as there are cars, the pipe E beingextended for that purpose by means of flexible connections between thecars. The pump exhausts the air from the cylinder A when it is desiredto operate the brakes, when the external atmospheric pressure upon thepistons B drives them toward each other and the longitudinal center ofthe cylinder, the pistonrods drawing the brakes against the wheels.

To release the brakes the pump should be stopped, when, through openingsin the heads ofthe pump, the air is admitted through theconnecting-pipes into the cylinder, when the atmospheric pressure isequalized and taken ofi the brakes.

- What I claim as my invention, and desire to secure by Letters Patent,is-

The arrangement of the cylinder A, pistons B, rods (3, pipes D E G H,and pump F, when constructed to operate substantially as and for thepurposes set fort THEODORE LUCE. Witnesses:

H. F. Ennnrs, H. S. SPRAGUE.

